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* [syzbot] [fs?] WARNING in minix_put_super
@ 2026-10-11 20:50 syzbot
  0 siblings, 0 replies; only message in thread
From: syzbot @ 2026-10-11 20:50 UTC (permalink / raw)
  To: linux-fsdevel, linux-kernel, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    b88c841d1164 Merge tag 'input-for-v7.3-rc6' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12adc5d1580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7d1b274ca9837366
dashboard link: https://syzkaller.appspot.com/bug?extid=bffc332f376fdab5cef0
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13fbc1d1580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-b88c841d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c64cd81f2bae/vmlinux-b88c841d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/605b0408da7b/bzImage-b88c841d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/adc9f1a572c3/mount_10.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bffc332f376fdab5cef0@syzkaller.appspotmail.com

------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:991 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:991, CPU#0: syz-executor/5457
Modules linked in:
CPU: 0 UID: 0 PID: 5457 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:991
Code: 4c 89 f7 e8 d9 d5 d7 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 34 44 fb ff e8 8f 56 65 ff eb 8c e8 88 56 65 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 7a 56 65 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000e597c90 EFLAGS: 00010293
RAX: ffffffff8262ca98 RBX: ffff8880468d50e0 RCX: ffff888036f5cb00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffff8880468d50e7 R09: 1ffff11008d1aa1c
R10: dffffc0000000000 R11: ffffed1008d1aa1d R12: 1ffff1100af668cf
R13: ffff888041a50580 R14: ffff888057b34678 R15: ffff888041a505c8
FS:  000055557bc8e500(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34db7ef158 CR3: 0000000014819000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 minix_put_super+0x16d/0x460 fs/minix/inode.c:70
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:751
 kill_block_super+0x44/0xa0 fs/super.c:1903
 deactivate_locked_super+0xbe/0x110 fs/super.c:586
 cleanup_mnt+0x204/0x2a0 fs/namespace.c:1392
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4096b9f417
Code: a2 c7 05 dc 62 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffeab55db28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4096c34ccb RCX: 00007f4096b9f417
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeab55dbe0
RBP: 00007ffeab55dbe0 R08: 00007ffeab55ebe0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeab55ec70
R13: 00007f4096c34ccb R14: 000000000003a52d R15: 00007ffeab55ecb0
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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If the report is already addressed, let syzbot know by replying with:
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If you want syzbot to run the reproducer, reply with:
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If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

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